Hartmut Hellmer
YOU?
Author Swipe
View article: On the drivers of regime shifts in the Antarctic marginal seas, exemplified by the Weddell Sea
On the drivers of regime shifts in the Antarctic marginal seas, exemplified by the Weddell Sea Open
Recent studies have found evidence for a potential future tipping point, when the density of Antarctic continental shelf waters, specifically in the southern Weddell Sea, will allow for the onshore flow of warm waters of open ocean origin.…
View article: Data for Haid et al.: On the drivers of regime shifts in Antarctic marginal seas... Part II
Data for Haid et al.: On the drivers of regime shifts in Antarctic marginal seas... Part II Open
4D potential temperature and salinity in Weddell region for perturbation experiments SA_G, SA_S, SA_W, SUMMER_S and SUMMER_S+SAw_W
View article: Data for Haid et al.: On the drivers of regime shifts in Antarctic marginal seas... Part I
Data for Haid et al.: On the drivers of regime shifts in Antarctic marginal seas... Part I Open
Data behind the figures in the article; 4D potential temperature and salinity in Weddell region for reference experiments REF and H20C, and reversal experiments R_ERA and R_H20C.
View article: Data for Haid et al.: On the drivers of regime shifts in Antarctic marginal seas... Part I
Data for Haid et al.: On the drivers of regime shifts in Antarctic marginal seas... Part I Open
Data behind the figures in the article; 4D potential temperature and salinity in Weddell region for reference experiments REF and H20C, and reversal experiments R_ERA and R_H20C.
View article: Data for Haid et al.: On the drivers of regime shifts in Antarctic marginal seas... Part II
Data for Haid et al.: On the drivers of regime shifts in Antarctic marginal seas... Part II Open
4D potential temperature and salinity in Weddell region for perturbation experiments SA_G, SA_S, SA_W, SUMMER_S and SUMMER_S+SAw_W
View article: The role of WDW density for a regime shift in the FRIS cavity
The role of WDW density for a regime shift in the FRIS cavity Open
A potential tipping point on the Antarctic continental shelves, in which cold shelf water is replaced by (modified) Circumpolar Deep Water (CDW) / Warm Deep Water (WDW), is currently the subject of many studies. Such a regime shift entails…
View article: Investigating Environmental Matrices for Use in Avian Influenza Virus Surveillance—Surface Water, Sediments, and Avian Fecal Samples
Investigating Environmental Matrices for Use in Avian Influenza Virus Surveillance—Surface Water, Sediments, and Avian Fecal Samples Open
Avian influenza viruses (AIV) have a wide host range in the avian metapopulation and, occasionally, transmission to humans also occurs. Surface water plays a particularly important role in the epidemiology of AIV, as the natural virus rese…
View article: Drivers and Reversibility of Abrupt Ocean State Transitions in the Amundsen Sea, Antarctica
Drivers and Reversibility of Abrupt Ocean State Transitions in the Amundsen Sea, Antarctica Open
Ocean warming around Antarctica has the potential to trigger marine ice‐sheet instabilities. It has been suggested that abrupt and irreversible cold‐to‐warm ocean tipping points may exist, with possible domino effect from ocean to ice‐shee…
View article: Comment on egusphere-2022-1044
Comment on egusphere-2022-1044 Open
Abstract. Recent studies found evidence for a potential future tipping point when the density of Antarctic continental shelf waters, specifically in the southern Weddell Sea, allows the onshore flow of warm waters of open ocean origin. A c…
View article: Comment on egusphere-2022-1044
Comment on egusphere-2022-1044 Open
Abstract. Recent studies found evidence for a potential future tipping point when the density of Antarctic continental shelf waters, specifically in the southern Weddell Sea, allows the onshore flow of warm waters of open ocean origin. A c…
View article: Observations of Modified Warm Deep Water Beneath Ronne Ice Shelf, Antarctica, From an Autonomous Underwater Vehicle
Observations of Modified Warm Deep Water Beneath Ronne Ice Shelf, Antarctica, From an Autonomous Underwater Vehicle Open
Filchner‐Ronne Ice Shelf (FRIS) is the world's largest ice shelf by volume. It helps regulate Antarctica's contribution to global sea level rise, and water mass transformations within the sub‐ice‐shelf cavity produce globally important den…
View article: On the drivers of regime shifts in the Antarctic marginal seas
On the drivers of regime shifts in the Antarctic marginal seas Open
Recent studies found evidence for a potential future tipping point when the density of Antarctic continental shelf waters, specifically in the southern Weddell Sea, allows the onshore flow of warm waters of open ocean origin. A cold-to-war…
View article: Tipping of the Filchner-Ronne and other Antarctic ice shelf cavities
Tipping of the Filchner-Ronne and other Antarctic ice shelf cavities Open
<p>Tipping of an ice shelf cavity from a cold to a warm state happens when a sustained inflow of warm Circumpolar Deep Water (CDW) or a modified variant of it replaces High Salinity Shelf Water (HSSW) and Ice Shelf Water (ISW) in a c…
View article: Ensemble of ice shelf basal melt rates and ocean properties for tipped-over continental shelves
Ensemble of ice shelf basal melt rates and ocean properties for tipped-over continental shelves Open
Summary: This dataset contains the reference and tipped states from several model configurations developed at the Alfred Wegener Institute (AWI) and the Institut des Géosciences de l’Environnement (IGE). They were gathered here in the cont…
View article: Ensemble of ice shelf basal melt rates and ocean properties for tipped-over continental shelves
Ensemble of ice shelf basal melt rates and ocean properties for tipped-over continental shelves Open
Summary: This dataset contains the reference and tipped states from several model configurations developed at the Alfred Wegener Institute (AWI) and the Institut des Géosciences de l’Environnement (IGE). They were gathered here in the cont…
View article: FRIS Revisited in 2018: On the Circulation and Water Masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea
FRIS Revisited in 2018: On the Circulation and Water Masses at the Filchner and Ronne Ice Shelves in the Southern Weddell Sea Open
The Filchner‐Ronne Ice Shelf (FRIS) is characterized by moderate basal melt rates due to the near‐freezing waters that dominate the wide southern Weddell Sea continental shelf. We revisited the region in austral summer 2018 with detailed h…
View article: FRIS revisited in 2018: On the circulation and water masses at the Filchner and Ronne Ice Shelves in the southern Weddell Sea
FRIS revisited in 2018: On the circulation and water masses at the Filchner and Ronne Ice Shelves in the southern Weddell Sea Open
Earth and Space Science Open Archive This work has been accepted for publication in Journal of Geophysical Research - Oceans. Version of RecordESSOAr is a venue for early communication or feedback before peer review. Data may be preliminar…
View article: Historic simulations of the Antarctic Ice Sheet with the Parallel Ice Sheet Model
Historic simulations of the Antarctic Ice Sheet with the Parallel Ice Sheet Model Open
<p>Large uncertainties in Antarctic sea level projections are related to ocean-driven melting (Seroussi et al., 2020; Jourdain et al., 2020; Reese et al., 2020; Edwards et al., in press) and the marine ice sheet instability (Robel et…
View article: FISP/FISS Filcher Ronne Ice Shelf cavity (Southern Weddell Sea, Antartcica) oceanographic mooring and ice shelf basal melt rate radar data from 2015 to 2019, processed and low-pass filtered
FISP/FISS Filcher Ronne Ice Shelf cavity (Southern Weddell Sea, Antartcica) oceanographic mooring and ice shelf basal melt rate radar data from 2015 to 2019, processed and low-pass filtered Open
Time series of multi-annual (2015-2019) in-situ measurements of ocean hydrography (temperature, salinity) and ocean current velocities from five hot-water borehole deployed moorings inside the Filchner Ronne Ice Shelf cavity (Southern Wedd…
View article: Necessary Conditions for Warm Inflow Toward the Filchner Ice Shelf, Weddell Sea
Necessary Conditions for Warm Inflow Toward the Filchner Ice Shelf, Weddell Sea Open
Understanding changes in Antarctic ice shelf basal melting is a major challenge for predicting future sea level. Currently, warm Circumpolar Deep Water surrounding Antarctica has limited access to the Weddell Sea continental shelf; consequ…
View article: Impact of West Antarctic ice shelf melting on Southern Ocean hydrography
Impact of West Antarctic ice shelf melting on Southern Ocean hydrography Open
Previous studies show accelerations of West Antarctic glaciers, implying that basal melt rates of these glaciers were previously small and increased in the middle of the 20th century. This enhanced melting is a likely source of the observe…
View article: Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017
Exceptionally Warm and Prolonged Flow of Warm Deep Water Toward the Filchner‐Ronne Ice Shelf in 2017 Open
The Filchner‐Ronne Ice Shelf, fringing the southern Weddell Sea, is Antarctica's second largest ice shelf. At present, basal melt rates are low due to active dense water formation; however, model projections suggest a drastic increase in t…
View article: Antarctic sea ice decline delayed well into the 21st century in a high-resolution climate projection
Antarctic sea ice decline delayed well into the 21st century in a high-resolution climate projection Open
<p>Despite ongoing global warming and strong sea ice decline in the Arctic, the sea ice extent around the Antarctic continent has not declined during the satellite era since 1979. This is in stark contrast to existing climate models …
View article: A recent update on the circulation and water masses around the Filchner and Ronne ice shelves in the southern Weddell Sea
A recent update on the circulation and water masses around the Filchner and Ronne ice shelves in the southern Weddell Sea Open
<p>The Filchner and Ronne ice sheets (FRIS) compose the second largest contiguous ice sheet on the Antarctic continent. Unlike at several other Antarctic glaciers, basal melt rates at FRIS are comparatively low, as cold and dense wat…